#fff311
a balanced, electric yellow · cool · closest name: yellow
RGB
255, 243, 17
HSL
57°, 100%, 53%
CMYK
0, 5, 93, 0
Luminance
0.8540
Every format
| HEX | #fff311 |
| RGB | rgb(255, 243, 17) |
| HSL | hsl(57, 100%, 53%) |
| CMYK | cmyk(0%, 5%, 93%, 0%) |
| LAB | lab(94.1 -15.7 90.9) |
| LCH | lch(94.1 92.2 99.8) |
| OKLCH | oklch(0.943 0.199 106.0) |
Copy-ready code
/* CSS */
color: #fff311;
background-color: #fff311;
/* Tailwind (arbitrary) */
class="text-[#fff311] bg-[#fff311]"
/* SCSS */
$brand: #fff311;
/* SwiftUI */
Color(red: 1.000, green: 0.953, blue: 0.067)
/* Android */
Color.parseColor("#fff311")Accessibility — WCAG contrast
Aa
#fff311 on white: 1.16:1
AA ✗ fail · AA-large ✗ · AAA ✗
Aa
#fff311 on black: 18.08:1
AA ✓ pass · AA-large ✓ · AAA ✓
true color
protanopia
deuteranopia
tritanopia
RGB percentages
Red100.0%
Green95.3%
Blue6.7%
CMYK percentages
Cyan0.0%
Magenta4.7%
Yellow93.3%
Key (black)0.0%
Color previews
#fff311 text on a black background
contrast 18.08:1
Card sample
#fff311 text on a white background
contrast 1.16:1
Card sample
CSS3 live lab
Text font color
The quick brown fox
color: #fff311;
Background color
Panel with #fff311 background
background-color: #fff311;
Text shadow — hex
Glowing headline
text-shadow: 2px 2px 8px #fff311;
Text shadow — RGB
Soft neon halo
text-shadow: 0 0 14px rgba(255, 243, 17, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(255, 243, 17, 0.45);
Border & gradient
Gradient panel
border: 3px solid #fff311; background: linear-gradient(135deg, #fff311, #6CFF11);